Average Co-Inventor Count = 1.14
ph-index = 3
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Kotobuki Co., Ltd. (4 from 294 patents)
2. Westek International Corporation (1 from 2 patents)
4 patents:
1. 8733262 - Needle thread passing device
2. D451142 - Barrel for a writing instrument
3. D445455 - Barrel for a writing instrument
4. D445132 - Pattern of a writing instrument barrel